JPH10304787A - Sorting device for small fish - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sort the size of thin and long objects such as small fish or the like with a length as a reference by the device of a simple structure by tilting and supporting a sorting plate provided with a sorting hole at the angle of the repose of fish to be sorted. SOLUTION: This sorting device 10 is provided with a belt type sorting conveyor 20 supported by a rack 11 and the sorting conveyor 20 is installed by being tilted to the angle of the repose to the fish to be sorted, that is the angle of about 45 deg. close to the critical angle of whether or not to slide down. A conveyor belt 25 transfers the fish F to be sorted from a lower part to an upper part and the plane shape of the sorting hole is turned to a rectangular shape whose length in a vertical direction is larger than the length in a width direction. It is preferable to install an excitation device for exciting the sorting plate in a surface direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sorting apparatus suitable for classifying shirasu fish and other small fishes by fish length.

[0002]

2. Description of the Related Art Conventionally, when a small fish is used as a product, it is classified into a fish having a required fish length and a fish not having a required fish length. As a means for this, as shown in FIG. A large number of round or square holes H having a predetermined cross-sectional area are provided on the conveyor belt B, and small fishes are placed on the holes and shaken to separate those into and out of those holes. That is, the size was classified into large and small based on the thickness of the fish body.

[0003]

However, since the fish body has a small head and tail and a large trunk, if a relatively large fish enters the selection hole, it cannot pass through, and the selection plate is clogged and continuous selection is performed. And could not be sorted efficiently. On the other hand, a long fish is difficult to pass through the selection hole even if the fish is relatively small, so that high accuracy could not be expected in selecting a slender fish having a soft fish body. Furthermore, when the size of the fish is selected based on the thickness of the fish, there is little variation in the thickness of the fish, so that the fish length of the selected fish varies greatly, and forced reselection by visual inspection.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to provide a sorting plate having a sorting hole with a bottom that is smaller than the selected fish by ゝ, and the sorting plate is supported at an angle near the angle of repose of the selected fish. It is solved by doing. Also, the sorting plate is configured as a conveyor belt of a belt conveyor that forms a sorting conveyor, and the upper surface of the conveyor belt may be operated in a direction from below to above. It is preferable that the planar shape of the sorting hole is a rectangle whose length in the vertical direction is larger than the length in the width direction. Further, it is preferable that a vibration device for vibrating the selection plate in a plane direction is attached to the selection plate.

[0005]

[Function] The fish to be sorted placed on the sorting plate lies on the bottom of the sorting hole or on the sorting hole because of the bottom in the sorting hole. Therefore, whether or not the length of the fish is larger than the selection hole is a criterion for selection. As in the conventional case, a large fish slides down on the selection plate, and a small fish lies at the bottom of the selection hole. Fish with intermediate fish lengths have their heads or tails in the sorting hole and the rest outside the sorting hole. When the sorting plate is configured as a conveyor belt of a belt conveyor, those falling into the sorting holes move upward together with the conveyor belt, and those not entering the sorting holes slide down on the conveyor belt and move downward. . In addition, if the plane shape of the selection hole is a quadrangle, and particularly a rectangle whose length in the vertical direction is larger than the length in the width direction, a reduction in the selection accuracy due to an increase in the length of the diagonal is avoided. Furthermore, the screening plate is vibrated in the plane direction by the vibration device, and an intermediate fish body whose only the head or tail has fallen into the screening hole can be taken out of the screening hole again.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. In FIG. 1, reference numeral 10 denotes an apparatus for sorting small fishes according to the present invention, and specifically, an apparatus for sorting white fish used as a material for boiled and dried fish. The sorting device 10 has a belt-type sorting conveyor 20 supported by a gantry 11. Sorting conveyor 2
0 is inclined at an angle of repose of about 45 ° which is close to the angle of repose for the selected fish, that is, the critical angle of slipping or not falling, and the conveyor belt 25 of the conveyor belt 25 transfers the selected fish F from bottom to top. It has become. The shirasu fish as the selected fish has a fish length of 10 to 30 mm and a thickness of 4 to 5 mm. Reference numeral 12 denotes a short fish box for taking out selected undersized fish, and 13 denotes a long fish box for taking out a fish having a predetermined size, both of which are supported by the gantry 11. Reference numeral 14 denotes a supply conveyor for supplying the fish F to be sorted onto the sorting conveyor 20, which is a conventionally known belt conveyor.

The sorting conveyor 20 comprises a main frame 21 in which two channel steels are welded to each other at a predetermined interval from each other.
And a sub-frame 22 disposed directly above and in parallel with the main frame 21. A drive roller 23 and a driven roller 24 are supported at the upper end of the main frame 21 and a conveyor belt 25 is wound between the rollers 23 and 24. The upper surface of the conveyor belt 25 is
Are guided by rollers 27, 27, and the lower surface is stretched downward by a tensioner 26. Reference numeral 28 denotes an electric motor for driving the driving roller 23. The electric motor 28 is supported by an electric motor frame 21 a coupled to the upper end of the main frame 21, and drives the driving roller 23 by a V-belt 28 a and pulleys 29, 29. Thus, when the electric motor 28 is operated, the driving roller 23 rotates via the V-belt 28a, and the conveyor belt 25 is pulled by the upper driving roller 23, and the upper surface of the sub-frame 22 is opened from the side where the driven roller 24 is released. Through the drive roller 23.

The sub-frame 22 is formed by welding two channel steels slightly smaller than the main frame 21 face to face at a predetermined interval. The sub-frame 22 is the roller 2
While a large number of the members 7 and 27 are rotatably supported, they are elastically supported on the main frame 21 by thin belt-shaped spring members 35 at two locations, one end and the other end. As a result, the sub frame 22 can slightly move up and down with respect to the main frame 21. That is, as shown in an enlarged manner in FIG. 2, the spring member 35 is connected to the main frame 21 at one end, and is connected to the sub-frame 22 at the other end by bolts.
This allows the sub-frame 22 to be displaced in the direction indicated by the arrow.

[0009] The sub-frame 22 is
The vibrator 30 is connected to a vibrator 30 supported by As shown in FIG. 3, the vibrator 30 includes a crankshaft 32 driven by a vibrating motor 31 and a connecting rod 34 connected to a crankpin 33 of the crankshaft 32. A part is pivotally connected to the sub-frame 22 so as to be rotatable. Thus, when the excitation motor 31 rotates the crankshaft 32, the small end of the connecting rod 34
The crank pin 33 reciprocates a distance twice as much as the amount of deviation. When the sub-frame 22 is moved outward by this reciprocating motion and the conveyor belt 25 is tensioned, the tensioner 2
6 leaves and the conveyor belt 25 is relaxed. By this movement, the conveyor belt 25 is driven by the driven roller 24.
Is swung in the plane direction on the upper surface of the sub-frame 22 while reaching the drive roller 23.

The conveyor belt 25 has a large number of sorting holes 40 having a bottom on the front side. In other words, the conveyor belt 25 is formed as a sorting hole 40 by integrally forming a rectangular wall member 25b on the upper surface of the belt main body 25a. The selection hole 40 has a rectangular shape that is long in the traveling direction of the conveyor belt 25, and the length of each side is set so that a diagonal line is substantially the same as the fish length of the long fish. The depth of the selection hole 40 is about three times the depth of the fish. Further, the thickness of the partition wall forming the selection hole 40 is at least about the same as the fish, and the edge of the selection hole 40 damages the fish,
It is made smoothly so that the fish body is not caught and the sorting accuracy is not lowered.

According to the sorting apparatus 10, when the selected fish F is supplied from the supply conveyor 14 onto the sorting conveyor 20, the selected conveyor is inclined at about the angle of repose of the selected fish. Part of F is conveyor belt 2 by its own weight
5, and the rest moves downward by the vibration provided by the shaker 30. At this time, when the short fish having a short fish length reaches the sorting hole 40, it falls into the sorting hole 40,
It is transported upward by the conveyor belt 25 and falls into the short fish box 12 when the conveyor belt 25 is inverted by the drive roller 23. Since the long fish having a long fish length cannot enter the sorting hole 40, they slide downward on the wall member 25 b of the conveyor belt 25 and fall into the long fish box 13. That is, in the long fish, part of the fish body such as the head and tail is
Even if it falls into 0, the whole fish body does not completely enter the selection hole 40, and the rest remains outside the selection hole 40. Therefore, when the conveyor belt 25 is shaken by the vibrator 30, it is thrown out of the selection hole 40, Due to its own weight, the conveyor belt 25 slides downward in a direction opposite to the moving direction. Thus, the selected fish F is classified into short fish and long fish according to the length of the fish.

The present invention is not necessarily embodied in the form of a conveyor belt 25, but may be one in which a bottomed hole is formed in a plate that does not move. In addition, the concept of the invention of the present application is such that a bottomed sorting hole is provided with a small through hole that does not allow the fish to be sorted to pass, such as for drainage.

[0013]

According to the first aspect, an elongated object such as a small fish can be sorted into large and small objects based on its length by a device having a simple structure. According to the second aspect, the sorted fish supplied to the sorting conveyor are automatically separated into those that are carried upward according to the conveyor belt and those that fall without entering the sorting holes. According to the third aspect, since the selected fish does not enter or leave the short direction of the selection hole, the posture of the selected fish at the time of being selected is constant, and the selection accuracy is increased. According to the fourth aspect, the selected fish is swung on the selection plate, and the large fish is not caught by the selection hole and does not fall, thereby preventing erroneous sorting that is selected as a small fish. And so on.

[Brief description of the drawings]

FIG. 1 is a side view showing a small fish sorting apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged side view showing a main part A thereof.

FIG. 3 is an enlarged side view showing still another essential part B;

FIG. 4 is a front view showing a conveyor belt of a sorting conveyor.
And a ZZ cross-sectional view thereof.

FIG. 5 is a sectional view corresponding to FIG. 4 showing a conveyor belt of a conventional sorting conveyor.

FIG. 6 is a plan view of a sorting plate and its YY sectional view.

[Explanation of symbols]

10 ··· Small fish sorting device 11 ··· Stand 12 ··· Short fish box 13 ··· Long fish box 14 ··· Conveyor F ··· Sorted fish 20 · Sorting conveyor 21 ··· Main frame 21a ··· Motor frame 22 ··· Subframe 23 ··· Drive roller 24 ··· Follower roller 25 ··· Conveyor belt 25a ··· Belt body 25b: wall member 26: tensioner 27: roller 28: electric motor 28a: V
Belt 29 ... Pulley 30 ... Exciter 31 ... Exciter motor 32 ... Crank shaft 33 ... Crank pin 34 ... Connect rod 35 ... Spring member 40 ··· Sorting hole

Claims (4)

[Claims] An apparatus for sorting small fish, comprising a sorting plate provided with a sorting hole with a bottom that is slightly smaller than the fish to be sorted and having the sorting plate inclined and supported at an angle near the angle of repose of the fish to be sorted. 2. The small fish sorting apparatus according to claim 1, wherein the sorting plate is configured as a conveyor belt of a belt conveyor forming a sorting conveyor, and further, the upper surface of the conveyor belt is operated in a direction from below to above. 3. The small fish sorting apparatus according to claim 1, wherein the sorting hole has a rectangular shape having a vertical shape larger in length in the vertical direction than in the width direction. 4. A small fish sorting apparatus according to claim 1, further comprising: a vibrating device for vibrating the sorting plate in a plane direction.